Note 11 - Stock Based Compensation (Detail) - Stock Options - Valuation Assumptions	12 Months Ended
	Dec. 31, 2012
Risk-free interest rate(1)	2.53%	[1]
Dividend yield(2)	2.54%	[2]
Expected term(3) (in years)	4 years 73 days	[3]
Volatility(4)	81.22%	[4]
Discount for post-vesting restrictions	0.00%

[1] The risk-free interest rate for each grant is based on the U.S. Treasury yield curve in effect at the time of grant for a period equal to the expected term of the stock option.

[2] The dividend yield is calculated as a ratio of annualized expected dividends per share to the market value of our common stock on the date of grant.

[3] The expected term is calculated based on the observed and expected time to post-vesting exercise behavior of identifiable employee groups.

[4] The expected volatility is estimated based on a weighted average of historical volatility of our common stock.